Indicating and bboobding apparatus



June 3, 1941. K. MEER INDICATING AND RECORDING APPARATUS 2 Sheets-Sheet 1 Filed June 24, 1938 lg! I m umv o t/Pang ar 5' 646194? /0 June 3, 1941. K. MEER 2,244,653

mmcxri'ne AND RECQRDING APPARATUS Filed June 24, 1938 2 Sheets- Sheet 2 In vem'or: Ira rZ Nee-r,

Patented M3, 1941 2,344,558 INDICATING AND BIOOIDING APPARATUS KAI'IIOQI',VIIIIIIIQII,SGIIMGM,QI-

signer to Klensle 'laxameterand Apparate A.G..Villingen.8chwanwald,Germany Application June 24. 1988. Serial No. 215,550

In Germany July 1, 1937 Claims. (0!. 234-) This invention relates to an indicating and recording apparatus of the kind in which a recordismadeonachartorrecorddiscfitted in the apparatus. In apparatus of this kind the record disc must be so arranged that, after the lid of the apparatus has been opened, the record on the record disc can be read.

In order to meet this requirement, the operating mechanism together with the pen or stylus is fitted in thebody of the apparatus whereas the chart or record disc together with the clockwork mechanism 'for driving it is fitted in the lid of the apparatus, which is hinged so that it can be opened and closed. When the lid of the apparatus is opened, the clockwork mechanism and the chart or record disc swing outwards with it, so that the record on the chart becomes visible.

Now the present inventionirelates more particularly to controlling and recording apparatus of the type set forth and in which the factor to be controlled. for example the speed in the case of a recording speedometer, is also visibly indicated by a pointer or the like which moves over a scale. According to the invention the pointer, scale clockwork mechanism and the chart are fitted in the lid and the operating mechanism and the stylus or the like are fitted in the body of the casing and a coupling which may be automatically connected and disconnected when the lid is closed and opened is provided between the operating or controlling mechanism and a spindle on which the pointer is mounted.

An apparatus in accordance with the invention is illustrated by way of example in the accompanying drawings, in which Figure 1 is a section taken through the middle of the apparatus with the lid or cover closed.

Fig. 2 is a detail view showing in front elevation the part of the coupling which is arranged in the lid.

Fig. 3 is a sectional view through the coupling part shown in Fig. 2 on the line A-B of said designates the body of the apparatus and 2 the of the tube l5 whichis fixed fixed to a disc 24.

which carries the disc 24.

lid or cover which is hinged about the hinge I. The clockwork mechanism 4 together with the chart or record disc 5 is fixed to the lid. A sight hole 5 having a glass cover I is provided in the lid. Below the glass cover I is arranged a pointer 8 which moves over a scale 5 so that its movement are visible. The numeral ll designates a toothed wheel or the like which is actuated by the speed responsive" mechanism (not shown) and of which the angular displacement is transmitted to the stylus 8' and to the pointer I in the sight hole 5.

In order to transmit the indications from the wheel II to the pointer, the spindle ll of the pointer is iournalled centrally in the clockwork mechanism and the toothed wheel or the like II which is actuated by the speed responsive mechanism is iournalled on a post i2 which is fixed centrally in the body I. The actual coupling parts consist oi the driven disc I! which is fixed on the pointer spindle ii and is illustrated separately in Figures 2 and 3 and the driving disc II which can move axially under the influence of a spring and is illustrated separately in Figures 4 and 5. The rotary movement of the wheel III is transferred to the driving disc I by means to the wheel II and is provided with a pin II which engages inaslot l1 inthehubofthedisc ll. 'Apin ll (seel 'lgures 1,4and 5) isrivetedtothedisc it which can move axially on the tube II and is acted upon by a spring II. The axial movement of the disc I4 is limited by the length of thoslot ll. Inthedrivendisciliscuta groove 2| in which the pointed pin ll of the disc ll exactly fits. A spiral spring 2i ensures that the pointer I is held in its zero position, when the lid 2 of the apparatus is opened, by causing the pointer to bear against the stop 22.

The inner end of the spiral spring 2! is connected to the shaft ll while the outer end of this spring is connected to a pin 22 which is The disc 24 is fixed to a sleeve 240: which projects into the casing of the clockwork mechanism 4 and is ri idly connected to the A sleeve 25 which carries the record disc I is revoluble on the fixed sleeve The sleeve 25 is rotated by the clockwork mechanism.

When the apparatus is closed and the pointer I and shaft II are in the zero, or unactuated. position, the groove 2! and the pin II are opposite one another. If in the apparatus according to Fig. 1 the cover 2 is opened while said device is in operation, the pointer O and thecoupling normal position.

disc l8 are moved into zero position by means of spiral spring 2|. If in the meantime the machine, of which the speed or other magnitude is measured, is stopped, the gear I8 together with the coupler disc M is returned to normal position through a speedometer interposed between said disc and the machine. If new the cover 2 is again -'ciosed'th ;projection l8of disc M- will be in alignment with the corresponding groove 20 of disc I8, so that the discs l3, M by means of engagement of projection l8 with said groove 28 are coupled.

The conditions will be diiferent if cover 2 is reclosed while the machine is still running, since in this case the disc I 8 has been moved to normal position, but the coupler disc i4 by means of the speedometer is held in a position other than its As the cover is reclosed the disk i8 is moved to the right in Fig. 1, and the non-grooved part of disc 98 acts against the projection 98, so that disc i4, with tensioning of spring, i9, is pushed back and no coupling takes place. If in this'case'the machine-is then stopped, the disc I4 is turned into normal position by the arrested speedometer, so that the projection l8 will again catch the corresponding groove 20 of disc I3. The spring i8 forces the pin i8 into the groove 20 and ensures accurate movement of the-pointer 8 in accordance with movement of the gear l0. Owing to the resilient arrangement of the coupling part H, the closing of the cover of the apparatusduring operation does not interfere with the mechanism since, when the pin 38 does not enter the groove 28,

the coupling part i4 yields so that damage is" impossible.

In the form of construction Figure 6 a'spindle 21 is riveted to the inside of the casing 28 which corresponds substantially to the casing l in Figure -1. A sleeve 28 which is provided at the inner end with a toothed wheel 61 is revoluble on the spindle 21. The toothed wheel 81 is driven irom a speed responsive device, which is not illustrated in Fig. 6, through the agency of a further toothed wheel as in Figure 1. Another sleeve 29 which is provided at the rear end with two longitudinal slots 88 is axially displaceable on the sleeve 28. A pin 8| which is fixedon the sleeve 28 projects through one of these slots to cause the sleeves 28 and 29 to, rotate together. A helicalspring 82 is mounted on the sleeve 28 between the sleeve 28 and th spur wheel 81. The sleeve 28-can therefore be displaced axially along the sleeve 28 against the action oftthe spring 82 but cannot rotate thereon. The sleeve 28 is, however, rotated by the sleeve 28 when the latter rotates.

n the front face of the sleeve 29 is fixed a driver pin 38 which normally engages in "a radial groove 84 in a driver disc 85. All the parts which have just been described with the exception of the driver disc 85 are fitted in the casing 28, that is to say they remain in positionwhen the lid 88 of the casing, which corresponds to the lid 2 in Figure 1, is opened.

The driver disc 85 is fixed on a shaft 81 which can rotate in bearings 88 and 88. The

bearing 88 is fixed in a part 40 which is fitted to the casing 4| of a clockwork mechanism which is in general of the usual construction. The cylindrical spring core 42 of the clockwork mechanism is provided with a reduced sleevelike part d8. A central bore 44 extends throughout the entire length of the spring core 82 and the reduced part 48. The other bearing illustrated in core 42.

89 previously referred to is fitted in the bore 44 in the vicinity of the free end of the reduced part 48.

The casing 4| of the clockwork mechanism is fixed to the cover 88 by means of aplate 45 and pins 48 of which only one is shown in Figure 6. A'milled disc 41 by means of which the clockwork mechanism is wound up is revolubleon the casing 8| of the clockwork mechanism. The rotation of the disc 41 is transmitteiby means of a mechanism which is not illustrated, to the spring box 58 which is illustrated only in part in section. The outer end of the tension spring 48 is fixed to this spring box and the inner end is connected to the The core 42 is provided with a quadrangular extension 50 to which a toothed wheel 5| is fixed. The escapement mechanism (not shown) in the casing 4| controls the rotation of this toothed wheel.

A ring 52 to which a disc 58 is fixed is screwed on to the sleeve 48 of the core 42. To this disc 53 is clamped, by means of a leaf spring 54, a record disc or chart 55 on which a diagram is drawn in the usual manner. The leaf spring 54 is fitted on a ring 58 which can be slid over the ring- 52 and is fixed to it by means of a bayonet joint 51 or the like. The record disc 55 is therefore also driven in the proper time by the spring core 42. s

A helical spring 58 is arranged on the shaft 81 in the above-mentioned bore 44 of the spring core 42-. One end of the helical spring 58 is wound on the shaft 81 at 58 and fixed to the shaft by soldering or the like. The other end of the helical spring 58 is connected to a pin which is fitted in the plate 40 of the casing 4| of the clockwork mechanism.

The helical spring 58 acts in the same manner as the spiral spring 2| illustrated in Figure 1. The pointer 8| of the speed indicator which is fitted on the spindle 31 is always returned to the zero position by the helical spring 58 when the cover 38 which carries the clockwork mechanism 4| and the parts belonging to it is raised from the casing 26. On its return movement into the zero position, the pointer 8| meets a stop 82 fixed on the cover 88'. The result is therefore that, on closing the cover 88, the driver pin 88 always engages in the groove 84 in the disc 85 which is fixedto the shaft 81, when the entire apparatus is in thezero position, that is to say, in the nonoperating condition.

If during the operation of the speed responsive apparatus the cover 88 is opened and then closed again, no parts of the apparatus can be damaged because the pin which meets the non-grooved surface of the disc 85 is simply pressed back against the action of the spring 82. When the driving mechanism by which the toothed wheel 81 is rotated is arrested the pin 88 again engages in the groove.

The minute hand 88 and the hour hand 84 are driven in known manner by the aforesaid clockfrontwardly visible indicator, member on the spindle; means for yieldably restoring the indicator member and spindle to an unactuated position; an actuated member mounted in the casing and adapted for partial rotary movement and to be automatically restored to an unactuated position; and means automatically connecting said actuated member and spindle to each other when in said unactuated positions when the cover is moved to' closed position.

2. .An indicating apparatus comprising a casing having a cover carrying a clockwork; an indicat01- spindle mounted in and passing from the front to the rear of the clockwork and movable from unactuated to actuated position; a frontwardly visible indicator pointer mounted on the spindle in front of the clock-work; means for yieldably moving the pointer. to unactuated position; an actuated spindle mounted in the casing for partial rotation in alinement with the other spindle and adapted to be brought to a position of rest; and a coupling having members connected to, and carried by said spindles respectively, and constructed and positioned to be automatically coupled when the spindles are in said unactuated and rest positions and the cover is moved to closed position and to be automatically disconnected when the'cover is opened.

8. In apparatus as in claim 2, said coupling comprising a disk mounted fast on one spindle and a member mounted on the other spindl provided with a projecting pointed pin eccentric to the spindle, the disk being provided with a radial recess of V-shaped cross-section in which the point of said pin will engage when the spindles are in said positions. and a spring means tending 4 to hold said pin in'the recess; said disk having a smooth face on which the pin will yieldably engage at positions away from the recess. said face being adapted to guide the pin to the recess when the pin is moved to registration with the recess.

4. An indicating apparatus comprising a casing; a cover hinged thereto; an indicator spindle mounted in the cover and extending rearwardly toward the interior of the casing and movable from actuated to unactuated position; a frontwardly visible indicator pointer mounted on the front of the spindle; an actuated spindle mounted in the casing for partial rotation in alinement with the other spindle; a disk mounted fast on one spindle; a member mounted on the other spindle and provided with a projecting pointed pin eccentric to the spindles; the disk being provided with a substantially circular face having a radial recess of V-shaped cross-section, in which recess the point of said pin is engageable; and yieldable means to hold said pin in said recess; said disk having a smooth face on which the pin will yieldably engage when away from the recess; said face being adapted to guide the pin to the recess when the spindles are moved to bring the pin into registration with the recess.

5. Apparatus comprising a casing having a frontwardly-opening cover hinged to the front thereof; a clockwork carried by the cover; a record-disk support on the rear of the clockwork and rotated thereby and adapted to releasably hold a record disk; an indicator spindle carried by the cover passing from front to rear of the clockwork and record disk centrally through the record disk; an indicator on said spindle frontward of the clockwork and record disk so as to be visible frontwardly thereof; an actuated member rotatably mounted in the casing; and coupling means for connecting said spindle and member while the cover is closed for driving the spindle and adapted for automatically disconnecting them when the cover is opened.

KARL MEER. 

